双螺杆泵为一种双吸式非密闭的双螺杆泵。

Double screw pump is a kind of double suction not airtight double screw pump.

youdao

双螺杆泵为一种双吸式非密闭的双螺杆泵。

Double screw pump is a kind of double suction not airtight double screw pump.

youdao